Changes
"can't be" implies something else.
'''Special Summon-only monsters''' (often referred to as '''Semi-Nomi''' monsters) are monsters with the text "''Cannot be [[Normal Summon]]ed or [[Set]]. Must first be [[Special Summon]]ed...''" (before the [[Problem-Solving Card Text]] "''This card cannot be [[Normal Summon]]ed or [[Set]]. This card can only be [[Special Summon]]ed...''"). If a monster is a Special Summon '''only''' monster, then it means it must be Special Summoned by its listed effect before it can be Special Summoned by another effect. "[[Aqua Spirit]]", "[[Harpie Lady Sisters]]" and "[[Black Luster Soldier - Envoy of the Beginning]]" are all Special Summon only monsters.
After a Special Summon only monster has been Special Summoned properly (This means its summon can't be was not negated by Solemn Warning or cards such as "[[Solemn Judgment]]"), it can be Special Summoned through other effects. This only lasts as long as the monster does not return to the [[hand]] or [[Main Deck|Deck]]. As long as the monster remains on the [[Playing Field|field]], in the [[Graveyard]], or [[removed from play]], you can Special Summon it again with other card effects.
:Example:
